# PBR and cell data for metallic & roughness

**URL:** https://discourse.vtk.org/t/pbr-and-cell-data-for-metallic-roughness/8867
**Category:** Support
**Created:** [July 5, 2022, 11:45am UTC](https://discourse.vtk.org/t/pbr-and-cell-data-for-metallic-roughness/8867 "2022-07-05T11:45:06Z")
**Posts on this page:** 1
**Showing post:** 4

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### Author: ![Timothee\_Chabat](https://discourse.vtk.org/user_avatar/discourse.vtk.org/timothee_chabat/32/3234_2.png) [@Timothee\_Chabat](https://discourse.vtk.org/u/Timothee_Chabat)
#### Post date: [November 28, 2022, 8:41am UTC](https://discourse.vtk.org/t/pbr-and-cell-data-for-metallic-roughness/8867/4 "2022-11-28T08:41:47Z")

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you can see answers [here](https://discourse.vtk.org/t/pbr-materials-in-a-multiblockdataset/9816) for what is supported and what is not.

> [@andreasbuykx](#):
>
> If each material (or material class, e.g. concrete, masonry, soil, rock, … ) would require its own actor this would increase the number of actors considerably.

I think that should still be fine performance wise, even though it is clearly not the cleanest way to tackle this issue.

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